JP6429384B2 - Chair - Google Patents

Description

  The present invention relates to a chair.

In general, a chair is configured by providing a support structure with a seat and a backrest (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).
In such a chair, the pedestal arranged below the support structure is formed by a gas spring composed of an outer cylinder and a telescopic rod that moves forward and backward with respect to the outer cylinder. The upper and lower ends of the telescopic rod are fixed to the support structure, and can be moved forward and backward with respect to the outer cylinder by pressing a push valve provided on the top of the gas spring. Therefore, the seating position, that is, the position of the seat supported by the support structure, can be adjusted in the vertical direction by the expansion and contraction of the pedestal by the forward and backward movement of the telescopic rod. Further, by releasing the push valve, the vertical extension of the pedestal is restricted. That is, the chair that can adjust the position of the seat in the vertical direction as described above is provided with a lift stop mechanism that stops the vertical extension of the pedestal.

  Further, the backrest is rotatably supported by a pivot provided along the width direction of the support structure, and thereby can be tilted with respect to the support structure. Even with such a backrest, a rotation stopping mechanism for fixing the tilt position with respect to the support structure is provided.

  Since these stopping mechanisms apply an operating force to different parts, the operating system is divided. Specifically, the stop mechanisms are operated independently by linking the control members constituting the respective mechanisms to the corresponding members made of wires or the like corresponding to the respective control members. In addition, these stop mechanisms prevent the control members from interfering with each other by separating the control members on the support structure.

Japanese Patent No. 4153742 JP 2010-158441 A Japanese Patent No. 5026782

  By the way, these control members have a large movable range and operate at a site where a very large load acts. Accordingly, a corresponding thickness and height are also required on the support structure side that supports them, which is one factor that hinders downsizing of the support structure. However, downsizing of the support structure is indispensable for reducing the size and weight of the chair, and improvements are required.

  As a measure for reducing the size of the support structure, for example, like the chair disclosed in Patent Document 3, each control member is mounted on a base member separate from the support structure and unitized. It is also conceivable to hold it on a support structure. However, in order to prevent a plurality of control members from interfering with each other in one base member, the plurality of control members must be separated in the width direction and the depth direction of the chair. It is hard to say that this is an effective measure from the viewpoint of miniaturization.

  The present invention has been made in view of the above-described technical problems, and the object of the present invention is to control without incorporating an excessively large support structure when incorporating a control member or the like into the support structure without interfering with each other. An object of the present invention is to provide a chair capable of arranging members and the like.

  The chair of the present invention includes a support structure, a plurality of functional members provided so as to be operable with respect to the support structure, and a plurality of control mechanisms having control members that control the operation of the functional members. In the chair provided, the support structure is provided with a storage portion that stores the control member, and the storage portion is provided with a partition member that partitions the storage portion up and down, so that at least the upper storage chamber and the lower storage space are provided. And a control member of one of the control mechanisms is accommodated in the upper accommodation chamber, and another control mechanism of the control mechanism is accommodated in the lower accommodation chamber. The control member is accommodated.

  According to this chair, the storage portion for storing the control member is divided up and down by the partition member to form the upper storage chamber and the lower storage chamber, and the control member of one control mechanism of the control mechanisms is provided in the upper storage chamber. Since the control member of the other control mechanism among the control mechanisms is stored in the lower storage chamber, the control member can be stored separately in the upper storage chamber and the lower storage chamber so as not to interfere with each other Therefore, the control member and the like can be arranged without excessively increasing the support structure having the accommodating portion.

Further, the chair includes a pedestal arranged as the functional member below the support structure and configured to be extendable in the vertical direction, and the vertical extension of the pedestal is stopped as the control mechanism. It is preferable that a lifting / lowering stop mechanism including a pedestal column control member is provided, the storage unit is disposed above the pedestal column, and the pedestal column control member is stored in the lower storage chamber.
According to this configuration, since the storage portion is disposed above the pedestal and the pedestal control member is stored in the lower storage chamber of the storage portion, the pedestal control member is disposed in the vicinity of the pedestal. The lifting / lowering stopping mechanism including the pedestal control member can be formed compactly.

Moreover, in the chair, it is preferable that the housing portion is a bottomed hole that opens upward, and the partition member is formed by a separate member that is divided from the support structure.
According to this structure, the member which receives the upper end part of a pedestal can be arrange | positioned easily by utilizing the bottom face of a partition member. Moreover, a partition member can be easily set in a storage part.

In the chair, it is preferable that the leg member control member is rotatably supported on the lower surface of the partition member.
According to this configuration, the pedestal control member can be disposed in the housing portion in a state in which the pedestal control member is previously supported by the partition member, which contributes to an improvement in assembly efficiency.

In the chair, the functional member includes a backrest configured to be tiltable with respect to the support structure by being supported so as to be rotatable about a pivot in a width direction orthogonal to the vertical direction. The control mechanism includes a rotation stop mechanism including a backrest control member that fixes the backrest at a proper position in the rotation direction with respect to the support structure, and the support structure includes the backrest. A bearing portion that supports a pivot that supports the pivot shaft is provided, and the storage portion is disposed adjacent to the bearing portion in a front-rear direction perpendicular to the longitudinal direction of the pivot shaft, and the upper storage chamber includes The backrest control member is preferably accommodated.
The support structure is provided with a bearing portion that supports a pivot that supports the backrest, and the portion where the bearing portion is provided is a portion that rotatably supports the backrest via the pivot. It has a thickness and a height. On the other hand, the accommodating portion that accommodates the plurality of control members is disposed adjacent to the bearing portion in the front-rear direction perpendicular to the longitudinal direction of the pivot, so that the thickness and height of the portion where the bearing portion is provided are increased. By utilizing this, it is possible to continuously arrange the accommodating portion at this site. Therefore, according to this configuration, it is possible to minimize the arrangement space of the accommodating portion, and thereby it is possible to prevent the size of the support structure from becoming excessive.

Moreover, in the chair, it is preferable that the housing portion is a bottomed hole that opens upward, and the partition member is formed by a separate member that is divided from the support structure.
According to this configuration, the partition member can be easily set in the accommodating portion.

Further, in the chair, the accommodation portion is formed with a through hole that opens toward the pivot, and the backrest control member is configured to act on the pivot by moving back and forth in the through hole. It is preferable that the engaging pin is made.
According to this configuration, the through hole that opens toward the pivot is formed in the accommodating portion, and the engagement pin is made to act on the pivot by moving the through hole forward and backward. The dynamic resistance acts not on the partition member but on the support structure. Therefore, the backrest control member does not interfere directly or indirectly with the control member housed in the lower housing chamber below the partition member.

  According to the chair of this invention, arrangement | positioning of a control member etc. can be performed, without making the support structure which has an accommodating part excessive.

It is the perspective view which looked at the chair concerning one embodiment of the present invention from the front side. It is the perspective view which looked at the chair concerning one embodiment of the present invention from the back side. It is the disassembled perspective view which looked at the part containing the support base with which the chair in one Embodiment of this invention is provided from the front. It is the disassembled perspective view which looked at the support base with which the chair in one Embodiment of this invention is provided from back. It is the vertical sectional view which looked at the torsion unit with which the chair in one embodiment of the present invention is provided from the side. It is a longitudinal cross-sectional view of the torsion unit with which the chair in one Embodiment of this invention is provided. It is a principal part disassembled perspective view of a base part. It is a top view of a partition member. It is the perspective view seen from the front side of the control member support part. It is a top view of a mechanism control part. It is an enlarged side view including an operation unit. It is a top view of a linkage member holding part.

  Hereinafter, an embodiment of a chair according to the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is appropriately changed to make each member a recognizable size. In the following description, the front, rear, top, bottom, left, and right directions indicate directions viewed from the seated person.

  FIG. 1 is a perspective view of the chair 1 according to the present embodiment as viewed from the front side, and FIG. 2 is a perspective view of the chair 1 according to the present embodiment as viewed from the back side. As shown in these drawings, the chair 1 of this embodiment includes a leg portion 2, a support base 3, a seat 4, a backrest 5, and an armrest 6.

  The leg 2 includes a multi-limb leg 2a having casters 2a1 and a pedestal 2b that stands up from the center of the multi-limb leg 2a. The pedestal 2b is formed by a gas spring including an outer cylinder 2b1 and a rod (expandable rod) 2b2 that moves forward and backward with respect to the outer cylinder 2b1. The upper end of the rod 2b2 is fixed to the support base 3, and when the push valve 2b3 (see FIG. 5) of the gas spring provided at the top of the rod 2b2 is pressed, the rod 2b2 is against the outer cylinder 2b1. It can be moved forward and backward (up and down), that is, it can be moved up and down. When the push valve 2b3 is released, the rod 2b2 cannot move forward and backward with respect to the outer cylinder 2b1, and the vertical expansion and contraction of the pedestal 2b is stopped.

  Such a leg 2 enables the chair 1 to move on the floor surface by bringing the casters 2a1 into contact with the floor. Further, the seat 4 and the backrest 5 are supported by the pillars 2b so as to be movable up and down. Note that the operation of the operation unit 8 shown in FIG. 2 allows the rod 2b2 of the pedestal 2b to move up and down (extend / contract), so that the seat 4, the backrest 5 and the like can be raised and lowered. Under such a configuration, the pedestal 2b is one of the functional members in the present invention.

  As described above, the support base (support structure) 3 is fixed to the upper end portion of the rod 2b2 of the pedestal 2b, and supports the seat 4 from below and supports the backrest 5 so as to be tiltable. The support base 3 will be described in detail later. The seat 4 is a portion that supports a seated person who is a user of the chair 1 from below, and is supported by the support base 3 from below. Under such a configuration, the seating position, that is, the position of the seat 4 supported by the support base 3 can be adjusted in the vertical direction by the expansion and contraction of the above-mentioned pedestal 2b.

  The backrest 5 is a part that supports the seated person from the rear, and is connected to the support base 3 so as to be tiltable. As shown in FIG. 3, the backrest 5 includes a frame 5a that is fixed to the support base 3, a face member 5b that closes the opening of the frame 5a, and a tension member 5c that covers the face member 5b. Yes. FIG. 3 is a partially exploded perspective view including the support base 3 as viewed from the front of the chair 1.

  The frame 5a extends to the side of the support base 3 and connects a pair of forward-facing rods 5a1 that are spaced apart in the left-right direction of the chair 1 and the forward-facing rods 5a1 and a connecting portion 15c of a torsion unit 3b described later. The connecting portion 5a2 is formed, and the forward flange 5a1 and the connecting portion 5a2 form a recess 5a3 into which the connecting portion 15c of the torsion unit 3b is fitted. The armrest 6 is a part that supports the arm of the seated person from below, and two armrests 6 are fixed to the backrest 5 so as to sandwich the seat 4 from the left-right direction.

  Next, the support base 3 will be described in more detail with reference to FIGS. 4 is a partially exploded perspective view of the support base 3 as seen from the rear of the chair 1, FIG. 5 is a vertical sectional view of the torsion unit 3b as seen from the side, and FIG. 6 is a longitudinal section of the torsion unit 3b. FIG.

  As shown in FIGS. 3 and 4, in the chair 1 of this embodiment, the support base 3 includes a base portion 3a, a torsion unit 3b, a rotation stop mechanism (control mechanism) 3c as shown in FIG. A stop mechanism (control mechanism) 7. The base portion 3a is a strength member fixed to the upper end portion of the rod 2b2 (see FIGS. 1 and 2) of the pedestal 2b. The base portion 3a extends forward and has a seat 4 at the tip as shown in FIGS. Has two arms 3a1 directly fixed.

  Further, as shown in FIG. 4, a recess 3a2 for accommodating the torsion unit 3b is provided behind the base portion 3a. The concave portion 3a2 has a concave shape that is recessed forward from an end portion on the backrest 5 side of the base portion 3a in plan view. The two inner side surfaces 3a3 facing each other of the recess 3a2 are provided with fitting grooves (bearing portions) 3a4 for fitting the pivot 10 of the torsion unit 3b. In addition, as shown in FIG. 3, such a recessed part 3a2 is provided in the area | region pinched | interposed into the backrest 5 side, and was pinched | interposed into the left-right direction of the chair 1, and was pinched | interposed into a pair. . The distance between the rearward saddles 3a5 is substantially equal to the distance between the forward saddles 5a1 of the backrest 5 described above.

  The fitting groove 3a4 is provided in each of the inner side surfaces 3a3 so as to extend in the front-rear direction of the chair 1 at the same height, and the rear end reaches the rear end of the inner side surface 3a3. The open end. Further, the length of the fitting groove 3a4 in the front-rear direction is set to be longer than the width of the pivot 10 in the same direction (in this embodiment, twice or more).

  As shown in FIGS. 5 and 6, the torsion unit 3 b includes a pivot 10, a first rubber torsion 11, an inner cylinder member 12, a second rubber torsion 13, an outer cylinder member 14, and a housing 15. It is prepared for. The pivot 10 is a shaft member made of square members extending linearly in the left-right direction of the chair 1, and is held in the housing 15 with both end portions 10 a exposed from the housing 15 as shown in FIG. 6. Yes.

  As shown in FIG. 4, the both ends 10a of the pivot 10 are in contact with the inner end 3a4 of the recess 3a2 until the rear end (the end located on the front side of the chair 1) of the fitting groove 3a3. Is inserted into the fitting groove 3a4. Thereby, the torsion unit 3b is positioned in the state accommodated in the recessed part 3a2, and the pivot 10 is fixed to the base part 3a.

As shown in FIG. 5, the first rubber torsion 11 is a portion made of a rubber material provided around the pivot 10, is formed in a substantially cylindrical shape, and is interposed between the pivot 10 and the inner cylinder member 12. . That is, the first rubber torsion 11 has an inner peripheral surface fixed to the outer peripheral surface of the pivot 10 and an outer peripheral surface fixed to the inner peripheral surface of the inner cylinder member 12.
The inner cylinder member 12 is a cylindrical member formed of a rigid body such as metal or hard resin, and has a first engagement hole 12a on one side thereof, that is, the side opposite to the backrest 5. . The first engagement holes 12 a are through holes into which engagement pins 19 described later are detachably engaged, and two first engagement holes 12 a are arranged in the axial direction of the pivot 10.

  The second rubber torsion 13 is a portion made of a rubber material provided around the inner cylinder member 12, is formed in a substantially cylindrical shape, and is interposed between the inner cylinder member 12 and the outer cylinder member 14. That is, the inner peripheral surface of the second rubber torsion 13 is fixed to the outer peripheral surface of the inner cylindrical member 12, and the outer peripheral surface is fixed to the inner peripheral surface of the outer cylindrical member 14. Further, in the present embodiment, the second rubber torsion 13 is formed to be sufficiently shorter than the axial length of the inner cylinder member 12 as shown in FIG. Extrapolated.

  The outer cylinder member 14 is a cylindrical member formed of a rigid body such as metal or hard resin as shown in FIG. The outer cylinder member 14 and the second rubber torsion 13 are formed with two second engagement holes 14a penetrating them on one side. The second engagement holes 14a are through holes formed and arranged so that their center axes coincide with the center axis of the first engagement hole 12a, and the engagement pins 19 engage with each other so as to be insertable / removable. It is also possible to go through. Thereby, the engagement pin can be inserted into the first engagement hole 12a through the second engagement hole 14a.

  As shown in FIGS. 5 and 6, the housing 15 includes an upper member 15 a and a lower member 15 b, which cover the upper side and the lower side of the outer cylinder member 14 from the radially outer side of the pivot 10. As shown in FIG. 6, the upper member 15 a and the lower member 15 b are formed with fitting convex portions 15 d, and these fitting convex portions 15 d are the inner cylindrical member 12 and the fitting concave portion 12 b of the first rubber torsion 11. As a result, the upper member 15a and the lower member 15b are connected and fixed to the inner cylinder member 12 and the first rubber torsion 11. Note that the upper member 15a and the lower member 15b are not fixed to the outer cylinder member 14, but are merely separated from the outer cylinder member 14 to cover it.

  Under such a configuration, the torsion unit 3 b accommodates the pivot 10, the first rubber torsion 11, the inner cylinder member 12, the second rubber torsion 13, and the outer cylinder member 14 in the housing 15, and both ends of the pivot 10. A portion extends from the housing 15. Further, as shown in FIG. 3, the housing 15 has an opening 15e formed by forming a notch in each of the upper member 15a and the lower member 15b. A second engagement hole 14a formed in the outer cylinder member 14 is exposed in the opening 15e.

  A connecting portion 15 c for connecting to the backrest 5 is provided on the rear side of the housing 15. The connecting portion 15c is formed on the upper member 15a in the present embodiment, and the housing 15 is fixed to the backrest 5 by being fastened to the backrest 5 by a bolt (not shown) or the like. The connecting portion 15c is disposed on the backrest 5 side with respect to the pivot 10, the first rubber torsion 11, the inner cylinder member 12, and the like, and when the torsion unit 3b is accommodated in the recess 3a2 of the base portion 3a, the recess 3a2. It protrudes from the backrest 5 side.

  In such a torsion unit 3b, when both ends 10a and 10a of the pivot 10 are fixed to the support base 3, the backrest 5 is tilted and the housing 15 is rotated about the pivot 10. The first rubber torsion 11 and the second rubber torsion 13 are twisted, and the housing 15 is biased around the axis of the pivot 10 by the restoring force of the rubber torsion 11 and 13.

  At that time, as will be described later, the urging force of the rubber torsion 11 and 13 with respect to the housing 15 varies depending on the position of the engagement pin 19 provided to the support base 3 so as to be able to advance and retract. As shown by a two-dot chain line in FIG. 5, when the tip of the engagement pin 19 is not engaged with the second engagement hole 14a of the outer cylinder member 14 and is in the first position A1 in front of it, Since both the cylindrical member 14 and the inner cylindrical member 12 are not locked by the engagement pin 19, the cylindrical member 14 and the inner cylindrical member 12 can rotate with respect to the fixed pivot 10. Therefore, when a force is applied by the seated person so that the backrest 5 falls backward, and the housing 15 is rotated around the pivot 10, only the first rubber torsion 11 is twisted between the pivot 10 and this. Due to this restoring force, a relatively weak biasing force is generated toward the housing 15 side, that is, the backrest 5 side.

  Further, as shown by a two-dot chain line in FIG. 5, the distal end portion of the engagement pin 19 does not engage with the first engagement hole 12 a of the inner cylinder member 12, and the second engagement hole 14 a of the outer cylinder member 14. Since the outer cylinder member 14 is fixed to the support base 3 through the engagement pin 19 when the second rubber torsion 13 is in the second position A2 that engages only with the support base 3, the position of the second rubber torsion 13 is also fixed to the support base 3. . As a result, when the housing 15 is rotated around the pivot 10, the first rubber torsion 11 and the second rubber torsion 13 are twisted together with the pivot 10, so that a relatively strong force is applied by these restoring forces. The force is generated by being directed to the housing 15 side, that is, the backrest 5 side.

  Further, as indicated by a solid line in FIG. 5, the tip of the engagement pin 19 is engaged with the first engagement hole 12 a of the inner cylinder member 12 through the second engagement hole 14 a of the outer cylinder member 14. Since the inner cylinder member 12 is also fixed to the support base 3 via the engagement pin 19, the backrest 5 fixed to the inner cylinder member 12 via the housing 15 is tilted (turned). Motion) is stopped. That is, the rotation stop mechanism 3c according to the present invention is configured by the engagement pin 19 and the torsion unit 3b that form such a third position A3 and thereby indirectly act on the pivot 10. .

  In addition, between the base part 3a of the support base 3 and the torsion unit 3b, the rotation range control mechanism (not shown) which controls the rotation range of the housing 15 with respect to the base part 3a is provided. Specifically, the restriction projection 3c1 provided on the base portion 3a shown in FIG. 4 rotates between the upper edge and the lower edge of the opening 15e of the housing 15 shown in FIG. Or it is regulated so that no further rotation is possible by contacting the lower edge. Therefore, the rotation range is determined by the vertical width of the opening 15e. Such an opening 15e and the restriction pin constitute a rotation range restriction mechanism.

  Under such a configuration, the housing 15 can be rotated only within a predetermined angle range with respect to the base portion 3a. Therefore, the backrest 5 fixed to the housing 15 has a tilting range with respect to the support base 3. Is regulated. That is, the chair 1 of the present embodiment is regulated so that the tilting range of the backrest 5 is within a predetermined range by the rotation range regulating mechanism.

  Further, the position of the upper edge of the opening 15e of the housing 15 is such that when the pivot 10 is fitted into the fitting groove 3a4 provided in the base portion 3a in a state where the first rubber torsion 11 of the torsion unit 3b is not twisted. , It is set to be positioned below the restricting projection 3c1. That is, if the first rubber torsion 11 is not twisted in the direction in which the backrest 5 is laid down, the tip of the restricting protrusion 3c1 cannot be inserted into the opening 15e.

  Therefore, the first rubber torsion 11 is twisted in order to insert the tip end portion of the restricting projection 3c1 into the opening 15e. However, when the tip end portion of the restricting projection 3c1 is inserted into the opening portion 15e, the first rubber torsion 11 is inserted. As a result, the tip of the protrusion 3c1 comes into contact with the upper edge of the opening 15e. As a result, the first rubber torsion 11 cannot be restored until all of its torsion is eliminated. As a result, after the chair 1 is assembled, the housing 12 is always urged in the direction in which the backrest 5 is raised by the restoring force of the first rubber torsion 11, and an initial load is applied to the backrest 5 and the initial reaction force is applied. Will occur. That is, the backrest 5 generates an initial reaction force so as to be pushed further forward in the reference posture (the posture in the most raised state) which is a posture in which there is no load from the front.

  As shown in FIG. 7, which is an exploded perspective view of the main part of the base part 3 a, the base part 3 a of the support base 3 has a storage part 20 in front of the torsion unit 3 b, and hence in front of the longitudinal direction of the pivot 10. Is formed. The accommodating portion 20 is a concave shape that is recessed in a rectangular shape in plan view in the base portion 3a, that is, a bottomed hole that opens upward, and is formed immediately above and in the vicinity of the pedestal 2b as shown in FIG. . The support base 3 is formed with an attachment hole 21 that opens to the bottom surface of the accommodating portion 20, and the upper end portion of the pedestal 2 b is inserted into the attachment hole 21. Thereby, the push valve 2b3 of the gas spring provided at the upper end portion of the pedestal 2b protrudes from the mounting hole 21 and is positioned in the accommodating portion 20.

  Further, a through hole 3d is formed in the base portion 3a, one of which opens toward the housing portion 20 and the other of which opens toward the torsion unit 3b. As shown in FIG. 7, two through holes 3d are formed on the side wall of the housing portion 20 in the left-right direction, and each of the through holes 3d is exposed in the opening 15e of the housing 15 shown in FIG. Are arranged so as to have the same central axis. Thereby, the engagement pin 19 can be engaged with the second engagement hole 14a through the through hole 3d, and can be engaged with the first engagement hole 12a.

  Based on such a configuration, the engagement pin 19 is a backrest control member that controls the operation of the backrest 5, which is one of the functional members in the present invention, that is, the tilting of the backrest 5, and is described above. Thus, the rotation stopping mechanism 3c is configured together with the torsion unit 3b. The engagement pin 19 includes a small-diameter portion 19a that is detachably engaged with the second engagement hole 14a and the first engagement hole 12a, a large-diameter portion 19b that slides in the through-hole 3d, and a control member support described later. It consists of a locking portion 19 c that locks to the portion 24.

  The backrest 5 is connected to the torsion unit 3b via the pivot shaft 10, and therefore, the other through-hole 3d is open toward the backrest 5, that is, the functional member in the present invention. Further, such a through hole 3d serves as an operation support portion that supports and engages the engagement pin 19 serving as a control member in the present invention.

As shown in FIG. 7, a mechanism control unit 22 is accommodated in the accommodation unit 20. The mechanism control unit 22 is formed by a separate member that is divided from the support base 3, and includes a partition member 23, a control member support unit 24, and a linkage member holding unit 25.
The partition member 23 is a fixed portion that is housed and disposed in the housing portion 20 and is fixed by screwing. As shown in FIG. 5, the housing portion 20 is divided into upper and lower chambers 20a and 20b. Is forming.

  This partition member 23 has a bottom plate 23a having a rectangular shape in plan view as shown in FIG. 8 which is a plan view thereof, and as shown in FIG. 7, on one long side portion and both short side portions of the bottom plate 23a, Each has wall portions 23b and 23c rising upward. Then, as shown in FIG. 8, there are mounting pieces 23d at both sides of the wall portion 23c, that is, at the four corners of the partition member 23, and screws are inserted into holes 23e formed in these mounting pieces 23d, so that the accommodating portion 20 It is screwed to.

  The partition member 23 is formed with two protruding spring support portions 23f on the inner surface of the wall portion 23b, and an opening 23g is formed between them. Further, a support plate 26 is formed on the lower surface of the bottom plate 23a as shown by a two-dot chain line in FIG. The support plates 26 are formed on both sides of the opening 23g shown in FIG. 8, and are arranged in parallel with the wall 23c. A control lever 27 is supported between the support plates 26 and 26 as shown in FIG. The control lever 27 is pivotally supported between the support plates 26 and 26 by a pivot shaft 27a, whereby one end side is pivotable in the arrow B direction.

  The control lever 27 is arranged such that one end side 27b thereof is disposed immediately above the push valve 2b3 of the gas spring of the pedestal 2b and is in contact with or close to the upper surface of the push valve 2b3. Further, the other end side 27c is arranged immediately below the opening 23g shown in FIG. A lifting wire 30 is connected to the other end 27c via a connecting pin 30a. The lifting wire 30 functions as a linkage member in the present invention that is connected to an operation unit 8 (see FIG. 2) described later and transmits an external operation force by the operation unit 8 to the control lever 27.

  That is, when the operating unit 8 is pulled by operating the operating unit 8, the lifting wire 30 pulls up the other end side 27c of the control lever 27 via the connecting pin 30a. Then, the control lever 27 rotates around the rotation shaft 27a and the one end side 27b is lowered. As a result, when the push valve 2b3 of the gas spring is pressed, the pedestal 2b can be moved up and down. Further, when the operation force by the operation unit 8 is released, the pulling force to the lifting wire 30 is released, whereby the control lever 27 rotates in the reverse direction and does not press the push valve 2b3. Return to state. As a result, the pedestal 2b returns to a state where it cannot be raised or lowered.

  Based on such a configuration, the control lever 27 is a control member that controls the operation of the pedestal 2b, which is a functional member in the present invention. That is, the control lever 27 is a pedestal control member that stops the expansion and contraction of the pedestal 2b. And, by such a control lever (leg column control member) 27 and a push valve 2b3 of a gas spring controlled by the control lever 27, a lifting / lowering stopping mechanism 7 for stopping the vertical expansion / contraction of the leg column 2b is constituted. Has been.

  Thus, the control lever 27 which is a control member (leg pillar control member) of the elevation stop mechanism 7 is accommodated in the lower accommodation chamber 20b partitioned by the partition member 23. Further, in the upper storage chamber 20a partitioned by the partition member 23, the engagement pin 19 which is the control member (backrest control member) of the rotation stopping mechanism 3c described above is stored.

  As described above, the engagement pin 19 is inserted into the through hole 3d formed in the support base 3 as shown in FIG. 5, and is fixed to the control member support portion 24 shown in FIG. The control member support portion 24 is fixed to the engagement pin 19 and is held by the support base 3 via the engagement pin 19, and a predetermined gap is provided above the upper surface of the bottom plate 23 a above the control plate support portion 24. Is arranged. Thus, the control member support portion 24 is configured to be movable in a space formed on the bottom plate 23 a on the side opposite to the wall portion 23 b in the partition member 23. The control member support 24 and the partition member (fixed part) 23 constitute an intermediate member according to the present invention. As shown in FIG. 9, which is a perspective view of the control member support portion 24 as viewed from the front side, and FIG. 10, which is a plan view of the mechanism control portion 22, the support pin 24 is inserted and supported. Two holes (supporting portions) 24a are formed on the left and right.

  As shown in FIG. 5, these support holes 24a are arranged so that the central axis thereof coincides with the through hole 3d, whereby the engagement pin 19 is inserted through the support hole 24a and the through hole 3d. That is, a locking portion 19c of the engagement pin 19 is inserted into the support hole 24a, and is locked and fixed so as not to come out by a known locking member such as a C ring. In this state, the engagement pin 19 is slidably inserted into the through hole 3d in the large diameter portion 19b, and the small diameter portion 19a can be inserted into and removed from the second engagement hole 14a and the first engagement hole 12a. Is engaged.

  Further, as shown in FIG. 10, a coil spring 28 is externally attached to these engaging pins 19 on the side of the locking portion 19c. One end of the coil spring 28 abuts the inner surface of the control member support 24 with the locking portion 19c being extrapolated, and the other end is extrapolated to a spring support 23f formed on the wall 23b of the partition member 23. This is supported. With such a configuration, the control member support portion 24 is urged by the coil spring 28 to the side opposite to the wall portion 23b, that is, the through hole 3d side. Therefore, the engagement pin 19 fixed to the control member support portion 24 is urged toward the torsion unit 3b through the through hole 3d.

  Further, as shown in FIG. 9, the control member support portion 24 is provided with a plate portion 24b on the front side of the support hole 24a, and a groove 24c is formed on the plate portion 24b. As will be described later, when the engaging pin 19 is inserted into the through-hole 3d as described later, the grooves 24c are formed on the engaging portion 19c side when the engaging portion 19c side is formed long. It can be made to function as a temporary storage part utilized for temporarily supporting to the control member support part 24. FIG. Therefore, in the state where the engagement pin 19 is incorporated in the support base 3 as shown in FIG. 10, the engagement pin 19 is not held on the groove 24c but is spaced apart from it and disposed above it.

  Further, the control member support portion 24 is formed with a U-shaped protruding wall 24d that protrudes to the front side (the plate portion 24b side) between the two support holes 24a and the support plate 24b. The protruding wall 24d is formed with a notch 24e cut out from one side wall to the front wall, and the notch 24e is formed with a wide portion 24f having a wide width on one side wall side. One end of the tilting wire 31 is locked to the notch 24e as shown in FIG. That is, a locking member 31a is attached to one end side of the tilting wire 31, and this locking member 31a passes through the wide portion 24f of the cutout portion 24e and is pulled out to the outside (through hole 3d side) of the protruding wall 24d. As a result, it is locked to the notch 24e. Thereby, the one end side of the tilting wire 31 is locked to the protruding wall 24d.

  The tilting wire 31 is connected to an operation unit 8 (see FIG. 2), which will be described later, in the same manner as the lifting wire 30 and transmits an external operation force by the operation unit 8 to the engagement pin 19. Function as. That is, when the operating wire 8 is pulled, the tilting wire 31 pulls the control member support 24 against the urging force of the coil spring 28, and retracts it toward the wall 23b. Then, the engagement pin 19 fixed to the control member support portion 24 also moves backward toward the wall portion 23b, so that, for example, from the third position A3 shown in FIG. 5 to the second position A2 or the first position A1. Moving. Further, when the operation by the operation unit 8 is changed, and therefore the pulling force on the tilting wire 31 is changed, for example, the movement from the first position A1 to the second position A2 or the third position A3 is performed.

  Here, as shown in FIG. 11 which is an enlarged side view including the operation unit 8, the operation unit 8 includes an elevating operation member 8a and a tilt operation member 8b. The raising / lowering operation member 8a is connected to the raising / lowering linking member 32 including the raising / lowering wire 30 as shown by a two-dot chain line in FIG. 2, and is thereby connected to the control lever 27 for stopping the expansion and contraction of the pedestal 2b. . The tilt operation member 8b is also connected to the tilt link member 33 including the tilt wire 31 as shown by a two-dot chain line in FIG. 2, and is thereby coupled to the engagement pin 19 that controls the tilt of the backrest 5. Yes.

  For example, when the lifting operation member 8a is pulled upward, the control lever 27 is operated via the lifting / lowering linking member 32, and the push valve 2b3 is pressed as described above to expand and contract the vertical column 2b. to enable. Moreover, by returning to the original state, the pressing to the push valve 2b3 is released, and the vertical expansion and contraction of the pedestal 2b is stopped.

  The tilt operation member 8b corresponds to the mode M1 corresponding to the first position A1 of the tip of the engagement pin 19 shown in FIG. 5, the mode M2 corresponding to the second position A2, and the third position A3. Mode M3. When the tilting operation lever 8b1 of the tilting operation member 8b is positioned in the mode M1, the control member support portion 24 can be pulled most via the tilting link member 33, and the engagement pin 19 can be moved back most. As a result, the engagement pin 19 is retracted to the first position A1, and a relatively weak biasing force is generated toward the backrest 5 as described above. Accordingly, for example, “weak” is displayed at the position of the mode M1 corresponding to the first position A1 on the flange 8b2 of the tilting operation member 8b, so that the seated person can easily perform a desired operation. Yes.

  Further, when the tilting operation lever 8b1 of the tilting operation member 8b is positioned in the mode M2, the pulling force with respect to the control member support portion 24 can be slightly reduced, and the engagement pin 19 is moved back most by the biasing force of the coil spring 28 ( (A1 position) can be moved forward a little. As a result, the engaging pin 19 moves forward to the second position A2, and a relatively strong urging force is generated toward the backrest 5 as described above. Accordingly, for example, “strong” is displayed at the position of the mode M2 corresponding to the second position A2 on the flange 8b2 of the tilt operation member 8b.

  Further, when the tilt operation lever 8b1 of the tilt operation member 8b is positioned in the mode M3, the pulling force against the control member support portion 24 can be weakened most, and the engagement pin 19 can be moved forward most by the biasing force of the coil spring 28. it can. Thereby, the engaging pin 19 moves forward to the third position A3, and the tilting (turning) of the backrest 5 is stopped as described above. Accordingly, for example, “LOCK” is displayed at the position of the mode M3 corresponding to the third position A3 on the flange 8b2 of the tilt operation member 8b.

  As shown in FIG. 2, the lifting / lowering linking member 32 and the tilting linking member 33 are connected to the lifting / lowering operation member 8a and / or the tilting operation member 8b at one end, and then are externally operated by the seated person on the opposite side, that is, the seating person. 2 is drawn toward the left side opposite to the right side in FIG. 2, and the other end side is drawn into the mechanism control unit 22 in the housing part 20 of the support base 3 shown in FIG. Thereby, the raising / lowering linkage member 32 and the tilt linkage member 33 are extended on the support base 3 and in the support base 3 in a state where a large arc is drawn.

  As shown in FIG. 10, the elevating / lowering linking member 32 and the tilting linking member 33 are slidably inserted into the outer cylindrical member 32a (33a) and the outer cylindrical member 32a (33a), and the other end side is the outer cylindrical member. It has the wire 30 for raising / lowering which extends from the material 32a (33a), and the wire 31 for tilting (it is only hereafter described as the wire 30 and the wire 31). An outer cylinder end 32b (33b) is provided on the other end side of the outer cylinder member 32a (33a), and a wire 30 (31) extends to the other end side of the outer cylinder end 32b (33b).

  A linkage member holding part 25 is attached to the mechanism control part 22 on the side of the wall part 23b on the partition member 23 by screwing or the like. As shown in FIGS. 12 and 10 which are plan views of the linkage member holding portion 25, the end portion of the outer cylinder member 32a (33a) of the elevation linkage member 32 and the tilt linkage member 33, that is, the outer cylinder end 32b. A guide for movably guiding the outer cylinder fixing portion 25a1 (25a2) for fixing (33b) and the wire 30 (31) extending from the outer cylinder end 32b (33b) toward the control lever 27 and the engagement pin 19 Part 25b1 (25b2).

  The outer cylinder fixing portion 25a1 (25a2) has a groove shape for placing and holding the outer cylinder end 32b (33b), and is formed in the outer cylinder end 32b (33b) along the circumferential direction thereof. It has a locking projection 25c1 (25c2) for locking (not shown). With such a configuration, the outer cylinder fixing portion 25a1 (25a2) is held in the outer cylinder end 32b (33b) and the locking projection 25c1 (25c2) is locked to the locking groove 32c (33c) of the outer cylinder end 32b (33b). The outer cylinder end 32b (33b) is fixed to the linkage member holding part 25.

  The guide portion 25b1 (25b2) includes a groove portion 25d1 (25d2) formed continuously in the length direction of the outer cylinder fixing portion 25a1 (25a2) and the other end side (outer cylinder) of the groove portion 25d1 (25d2). And a guide hole 25e1 (25e2) formed on the side opposite to the fixing portions 25a1 and 25a2. The groove portion 25d1 (25d2) is formed by a groove having a narrower width than the outer tube fixing portion 25a1 (25a2) in order to accommodate and hold the wire 30 (31) extending from the outer tube end 32b (33b). .

  The guide hole 25 e 1 (25 e 2) is a hole that penetrates the upper surface (one side surface) and the lower surface (the other side surface) of the linkage member holding portion 25, and guides the wire 30 of the elevating linkage member 32. One guide hole 25e1 is formed in the portion 25b1, and two guide holes 25e2 are formed in the guide portion 25b2 that guides the wire 31 of the tilt linking member 33. As shown in FIG. 10, one of the two guide holes 25 e 2 is disposed on the wall portion 23 b side of the partition member 23, and the other is disposed on the protruding wall 24 d side of the control member support portion 24. That is, the two guide holes 25e2 are arranged so that the line connecting them is orthogonal to the length direction of the outer cylinder fixing portion 25a2.

  The guide portion 25b1 (25b2) having such a configuration guides the wire 30 (31) in a direction different from the direction in which the outer cylinder end 32b (33b) of the outer cylinder material 32a (33a) faces. That is, the guide portion 25b1 that guides the wire 30 of the lifting / lowering linking member 32 guides the wire 30 in the direction in which the outer cylinder end 32b faces by the groove portion 25d1, and then moves downward by the guide hole 25e1, as shown in FIG. The wire 30 is guided into the lower housing chamber 20b below the partition member 23 shown in FIG. Thus, the wire 30 is connected to the control lever 27 as described above through the opening 23g. Therefore, the guide portion 25b1 guides the wire 30 downward from the horizontal direction in which the outer cylinder end 32b faces.

  Further, as shown in FIGS. 10 and 12, the guide portion 25b2 for guiding the wire 31 of the tilt linking member 33 guides the wire 30 in the direction in which the outer cylinder end 32b faces by the groove portion 25d2, and then guides the two guide holes 25e2. The guide hole 25e2 that continues to the groove 25d2 is guided downward, and then is pulled out from the other guide hole 25e2 and guided to the protruding wall 24d side of the control member support 24. That is, the wire 31 returns to the upper surface on the side where the outer cylinder fixing portion 25a2 is provided by passing through the two guide holes 25e2. Thereby, the wire 31 is connected to the engagement pin 19 via the control member support portion 24 as described above. Therefore, the guide portion 25b2 guides the wire 31 in a direction orthogonal to the direction in which the outer cylinder end 33b faces after being lifted and lowered once from the horizontal direction in which the outer cylinder end 33b faces. A guide groove (not shown) for guiding the wire 31 is formed between the two guide holes 25e2 and 25e2 on the lower surface of the linkage member holding portion 25.

  With such a configuration, the two guide portions 25b1 and 25b2 guide the two wires 30 and 31 to different height positions, that is, the wire 30 to the lower storage chamber 20b and the wire 31 to the upper storage chamber 20a, respectively. .

In the chair 1 having such a configuration, in particular, the mechanism control unit 22 is assembled and the engaging pin 19 is inserted through the through hole 3d as follows.
First, the wire 30 of the elevating / lowering linking member 32 is passed through the guide hole 25e1 of the linking member holding portion 25. Then, the tip end side of the wire 30 is passed through the opening 23g of the partition member 23, and the connecting pin 30a provided at the tip end of the wire 30 is locked to the control lever 27 and connected thereto.

  Next, the partition member 23 as an intermediate member is placed in the housing portion 20 and fixed by screwing. At this time, the locking pin 19 a side of the engaging pin 19 is inserted rearwardly into the support hole 24 a of the control member support portion 24 and supported thereby, and is fixed to the control member support portion 24. Further, in this state, the control member support portion 24 is placed on the bottom plate 23a of the partition member 23 and supported thereon. As a result, the partition member 23 functions as a temporary support portion that places and supports the control member support portion 24 that supports the engagement pin 19. Subsequently, the partition member 23 is inserted into the accommodating portion 20 with the control member support portion 24 being supported, with the control member support portion 24 facing forward, and the engagement pin 19 is directed slightly downward while passing through the through hole 3d. Insert through. And if the partition member 23 is stored in the storage chamber 20, maintaining the state which the engagement pin 19 has penetrated 3 d of through-holes, the partition member 23 will be fixed by screwing as mentioned above. When the partition member 23 is fixed by screwing in this way, the control member support portion 24 fixed to the engagement pin 19 floats above the upper surface of the bottom plate 23a with a predetermined gap as described above. The state transitions from the state temporarily supported by the partition member 23 to the state supported by the support base 3.

As shown in FIG. 5, the control lever 27 attached to the lower surface of the partition member 23 is set in advance so that one end side 27b of the control lever 27 is in contact with or close to the push valve 2b3 at the top of the pedestal 2b. Keep it.
Next, the tip end side of the wire 31 of the tilting linking member 33 is sequentially passed through the two guides 25e2 of the linking member holding portion 25, and the locking member 31a at the tip of the wire 31 is locked to the notch portion 24e of the control member support portion 24. Let

Next, the coil spring 28 is interposed between the locking portion 19 c side of the engagement pin 19 and the spring support portion 23 f of the partition member 23.
Next, the outer cylinder end 32b of the elevating / lowering linking member 32 and the outer cylinder end 33b of the tilting linking member 33 are arranged on the outer cylinder fixing portions 25a1 and 25a2 of the linking member holding portion 25, respectively. The locking grooves 32c and 33c are locked.
Thereafter, the linking member holding portion 25 is disposed on the partition member 23 and fixed by screwing or the like. Thereby, the mechanism control part 22 can be assembled.

  As described above, according to the chair 1 of the present embodiment, the accommodating portion 20 that accommodates the engaging pin 19 and the control lever 27 that are control members is divided up and down by the partition member 23, and the upper accommodating chamber 20a and the lower accommodating chamber. 20b, the engaging pin 19 which is a control member of the rotation stopping mechanism 3c is accommodated in the upper accommodating chamber 20a, and the control lever 27 which is the control member of the elevation stopping mechanism 7 is accommodated in the lower accommodating chamber 20b. Therefore, the control member can be accommodated separately in the upper accommodation chamber 20a and the lower accommodation chamber 20b so as not to interfere with each other. Therefore, the control member or the like can be obtained without overloading the support base 3 having the accommodation portion 20. Arrangement can be made.

  Moreover, since the accommodating part 20 is arrange | positioned above the leg pillar 2b, and the control lever 27 used as a leg pillar control member is accommodated in the lower accommodating chamber 20b of the accommodating part 20, the control lever 27 is located in the vicinity of the leg pillar 2b. By being arranged, the lifting / lowering stopping mechanism 7 including the control lever 27 can be formed compactly. Thereby, size reduction of the support base 3 can be achieved.

  Moreover, since the accommodating part 20 is made into the bottomed hole which opens upwards, and the partition member 23 is formed with another member divided | segmented from the support base 3, the control lever 27 used as a member which receives the upper end part of the pedestal 2b Can be easily arranged in the lower housing portion 20b by utilizing the bottom surface of the partition member 23. Further, the partition member 23 can be easily set in the accommodating portion 20.

  In addition, since the control lever 27 is rotatably supported on the lower surface of the partition member 23, the control lever 27 is arranged in the housing portion 20 together with the partition member 23 in a state where the control lever 27 is supported by the partition member 23 in advance. Therefore, assembly efficiency can be improved.

  Further, a fitting groove (bearing portion) 3 a 4 for supporting the pivot shaft 10 that supports the backrest 5 is provided on the support base 3, and the portion where the fitting groove 3 a 4 is provided is connected to the backrest 5 via the pivot shaft 10. Since it is a part that is rotatably supported, it has a certain thickness and height. On the other hand, the accommodating portion 20 that accommodates the plurality of control members (the engaging pin 19 and the control lever 27) is disposed adjacent to the fitting groove 3a4 so as to be separated in the front-rear direction perpendicular to the length direction of the pivot shaft 10. Therefore, the accommodating part 20 can be continuously arrange | positioned in this site | part using the thickness and height of the site | part in which the fitting groove 3a4 is provided. Therefore, the arrangement space of the accommodating portion 20 can be minimized, and thereby the size of the support base 3 can be prevented from becoming excessive.

  Further, since the through hole 3d that opens toward the pivot 10 is formed in the accommodating portion 20, and the engagement pin 19 is made to act on the pivot 10 by moving back and forth in the through hole 3d, the backrest control member The load and sliding resistance of the engagement pin 19 itself act on the support base 3 instead of the partition member 23. Therefore, the engagement pin 19 does not interfere directly or indirectly with the control lever 27 housed in the lower housing chamber 20 b below the partition member 23.

  Further, the mechanism control unit 22 includes an intermediate member having a control member support portion 24 that supports the engagement pin 19, and an intermediate member composed of such a control member support portion 24 and a partition member (fixed portion) 23. Is fixed to the support base 3 in a state where the engagement pin 19 is supported by the support hole 24a and is also supported by the through hole 3d, the backrest 5 provided on the support base 3, the engagement pin 19, and The relationship can be a one-to-one relationship via the support base 3. Therefore, it is possible to improve the assembling accuracy by suppressing the deviation of the assembling accuracy between the backrest 5 and the engaging pin 19, whereby the engaging pin 19 is activated and acts on the backrest 5. Malfunction can be prevented.

  Further, since the partition member 23 functions as a temporary support portion of the control member support portion 24 before the intermediate member is fixed to the support base 3, the control member support portion 24 is mounted on the partition member 23. The control member support 24 and the engagement pin 19 supported by the control member support 24 can be stably supported on the partition member 23 by being placed and supported by the partition member 23. Therefore, the assembly of the engagement pin 19 can be facilitated.

  Further, the linkage member holding portion 25 includes an outer cylinder fixing portion 25a1 (25a2) for fixing the outer cylinder end 32b (33b) of the outer cylinder member 32a (33a) of the lifting / lowering linkage member 32 and the tilting linkage member 33, and the outer cylinder end. 32b (33b) has a guide portion 25b1 (25b2) for movably guiding the wire 30 (31) extending toward the control lever 27 and the engagement pin 19, so that the control lever 27 and the engagement The wire 30 (31) can be easily routed by the linkage member holding portion 25 without being restricted by the position of the joint pin 19. That is, since the guide part 25b1 (25b2) guides the wire 30 (31) in a direction different from the direction in which the outer cylinder end 32b (33b) faces, the wire 30 (31) is locally at the guide part 25b1 (25b2). Even if a bend with a large curvature is formed, since the wire 30 (31) extends from the outer cylinder end 32b (33b) in the guide portion 25b1 (25b2), the sliding resistance against the outer cylinder material 32a (33a) increases. There is nothing. Further, the guide portion 25b1 (25b2) is added to the two-dimensional route by adding a three-dimensional route by the guide hole 25e1 (25e2) to thereby guide the guide portion to a relatively long route per predetermined area in plan view. 25b1 (25b2) can be formed, and the direction of the wire 30 (31) is changed by passing the guide hole 25e1 (25e2). be able to. Therefore, as described above, the wire 30 (31) can be easily handled by the linkage member holding portion 25.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, it cannot be overemphasized that this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the torsion unit 3b includes the first rubber torsion 11 and the second rubber torsion 13, so that the urging force against the backrest 5 can be adjusted in two stages of “strong” and “weak”. However, the urging force against the backrest 5 may be made constant by using one rubber torsion. Moreover, the second rubber torsion 13 and the outer cylinder member 14 arranged on the inner cylinder member 12 are arranged in the axial direction of the inner cylinder member 12, and each of these functions independently, thereby preventing the backrest 5. The urging force may be adjusted in three or more stages.

  In the present invention, the side wall of the accommodating portion 20 that forms the through hole 3d is supported so that a part of the sliding resistance applied to the engagement pin 19 and the reaction force from the torsion unit 3b can be supported by the through hole 3d. 3 may be a separate member. Specifically, the side wall member in which the through-hole 3d is formed is formed separately from the support base 3, and is disposed so as to constitute one side wall of the accommodating portion 20 formed in the support base 3, and is supported by bolting or the like. Fix to group 3. By making the side wall member separate from the support base 3 in this way, the side wall member can be formed of a material having a relatively high strength such as iron, and the load applied to the engagement pin 19 is penetrated as described above. It can be configured to be supported by the holes 3d.

  Moreover, in the said embodiment, although the pivot 10 was fixed to the base part 3a, and the structure which fixed the housing 15 of the torsion unit 3b to the backrest 5 was demonstrated, the pivot 10 of the torsion unit 3b is fixed to the backrest 5, A configuration in which the housing 15 of the torsion unit 3b is fixed to the base portion 3a may be employed.

  Moreover, in the said embodiment, although the storage chamber 20 was partitioned into two chambers, the upper storage chamber 20a and the lower storage chamber 20b, by the partition member 23, for example, by using a plurality of partition members 23, the storage chamber 20 is moved up and down. Three or more chambers may be formed by partitioning.

  Moreover, in the said embodiment, the structure by which the backrest 5 side of recessed part 3a2 was open | released was employ | adopted. However, the present invention is not limited to this. For example, it is also possible to adopt a configuration in which the recess 3a2 is not completely opened toward the backrest 5 and is closed by a closing member. In such a case, for example, a through hole through which the connecting portion 15c passes is formed in the closing member so that the connecting portion 15c of the torsion unit 3b accommodated in the recess 3a2 protrudes toward the backrest 5.

DESCRIPTION OF SYMBOLS 1 ... Chair, 2 ... Leg part, 2b ... Leg pillar (functional member), 3 ... Support base (support structure), 3a4 ... Fitting groove (bearing part), 3c ... Rotation stop mechanism (control mechanism), 3d ... through hole (motion support part), 4 ... seat, 5 ... backrest (functional member), 7 ... lift stop mechanism (control mechanism), 10 ... pivot, 19 ... engagement pin (backrest control member), 20 ... Housing part, 20a ... Upper housing part, 20b ... Lower housing part, 22 ... Mechanism control part, 23 ... Partition member (fixed part), 24 ... Control member support part, 24a ... Support hole (support part), 24c ... Holding Groove (holding part), 25a1, 25a2 ... outer cylinder fixing part, 25b1, 25b2 ... guide part, 25e1, 25e2 ... guide hole, 27 ... control lever (leg pillar control member), 30 ... elevating wire (wire), 31 ... Tilting wire (wire), 32 ... Elevating and linking member, 33 ... Tilting and linking member, 2a, 33a ... outer tubular member, 32b, 33b ... outer tube end (end)

Claims (7)

A support structure;
A plurality of functional members operably provided with respect to the support structure;
In a chair provided with a plurality of control mechanisms having a control member for controlling the operation of the functional member,
The support structure is provided with an accommodating portion for accommodating the control member,
At least the upper storage chamber and the lower storage chamber are formed in the storage portion by providing a partition member that partitions the storage portion up and down,
The upper storage chamber accommodates a control member of one of the control mechanisms,
The lower storage chamber contains a control member of another control mechanism among the control mechanisms. As the functional member, it is disposed below the support structure, and includes a pedestal configured to be extendable in the vertical direction,
As the control mechanism, a lifting / lowering stopping mechanism including a pedestal column control member that stops the vertical expansion and contraction of the pedestal column,
The accommodating portion is disposed above the pedestal,
The chair according to claim 1, wherein the pedestal control member is accommodated in the lower accommodation chamber.   The chair according to claim 2, wherein the housing portion is a bottomed hole that opens upward, and the partition member is formed by a separate member that is divided from the support structure.   The chair according to claim 3, wherein the leg member control member is rotatably supported on the lower surface of the partition member. The functional member includes a backrest configured to be tiltable with respect to the support structure by being supported so as to be rotatable about a pivot in a width direction orthogonal to the vertical direction.
The control mechanism includes a rotation stop mechanism including a backrest control member that fixes the backrest at an appropriate position in the rotation direction with respect to the support structure,
The support structure is provided with a bearing portion that supports a pivot that supports the backrest,
The accommodating portion is disposed adjacent to and spaced apart from the bearing portion in the front-rear direction perpendicular to the length direction of the pivot,
The chair according to any one of claims 1 to 4, wherein the backrest control member is accommodated in the upper accommodation chamber.   The chair according to claim 5, wherein the housing portion is a bottomed hole that opens upward, and the partition member is formed by a separate member that is divided from the support structure. The accommodation portion is formed with a through hole that opens toward the pivot,
The chair according to claim 6, wherein the backrest control member is an engagement pin configured to act on the pivot by moving back and forth in the through hole.

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